Part Accuracy Management by Topological Mapping of Deviations

Abstract:

Despite modern manufacturing processes are characterized by a continuously increasing accuracy, geometric deviations inherently appear on every manufactured part so, for quality-aware companies, it is essential to control and to manage them. This paper introduces a new type of part geometrical model, namely the part topological map, in connection with a new approach in part accuracy management. The part topological map enables a global analytical & synthetic approach of the problems related to tolerancing domain and a generalization of the “part accuracy” concept. The part geometry is seen as a stand-alone ensemble of surfaces dimensionally related, unitary and with its own shape, dimensions and position. The real geometry has also a global, unitary deviation, characterized through deviation features. Each component surface is represented in a particular manner, unrolled, while its deviation features are assessed by using series expansion of the deviations corresponding to a cloud of measured points. A method for effectively realizing the topological map of a part deviation and a numerical exercise to illustrate the method application in a concrete case are also included.

• Periodical: Applied Mechanics and Materials (Volume 859)
• Pages: 210-216
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.859.210
• Online since: December 2016
• Authors: Gabriel Radu Frumuşanu*, Alexandru Epureanu
• Keywords: Cloud of Measured Points, Deviation Topological Map, Dimensional Deviation Features, Linkage Map, Part Accuracy Management

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